[mapserver-users] Output Raster format

[Rahkonen Jukka]

Hi,
 
Try adding something like
PROCESSING "LUT=0:0,255:200"
 
It should give an linearly lightened image.  Have a try and play with the LUT input/output values, perhaps you'll get a more usable output. By using separate LUT inputs you can control red, green and blue separately. If you want to use WYSIWYG tool for colour adjustment take a sample image into GIMP, use curves tool and save the GIMP curve file once you are satified.  "PROCESSING LUT=" accepts the curve files saved from GIMP. 
 
GIMP is not meant for big geospatial images. Use some reasonably sized image excerpt for adjusting colours with it.
 
-Jukka-
 


________________________________

	Lähettäjä: David Martinez Morata [mailto:damarmo at gmail.com] 
	Lähetetty: 6. kesäkuuta 2008 11:52
	Vastaanottaja: Rahkonen Jukka
	Kopio: mapserver-users at lists.osgeo.org
	Aihe: Re: [mapserver-users] Output Raster format
	
	
	Thanks!
	
	I read about procesing functions, but I don't really understand the functions :S
	
	I have a WMS for raster cartographyc fonds and I need to do more clear images. the colors in the images are strong colors and when I insert a shape I have some problems to clear show this shape.
	
	Any sugestions?
	
	Thanks
	
	
	2008/6/3 Rahkonen Jukka <Jukka.Rahkonen at mmmtike.fi>:
	

		Hi
		 
		Mapserver is not much like web processing service.  However, something can be done with layer PROCESSING directives SCALE and LUT.  There may be other options for customizing which I am not aware.
		 
		http://mapserver.gis.umn.edu/docs/howto/raster_data/#special-processing-directives
		 
		Sometimes I have been thinking that it would be nice to have an option to push aerial photos out through some sort of sharpening filter.
		 
		-Jukka Rahkonen-


________________________________

			Lähettäjä: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] Puolesta David Martinez Morata
			Lähetetty: 3. kesäkuuta 2008 11:48
			Vastaanottaja: mapserver-users at lists.osgeo.org
			Aihe: [mapserver-users] Output Raster format
			
			
			Hello!
			
			I have a question about customizing output format for a WMS server.
			
			I have a Raster collection in .tiff format, I make a wms server with this raster files. The output in mapfile its not specified in map file.
			My question its:
			
			Can we change the contrast, saturation and other values for output image? How? With GDAL functions?
			
			Thanks.
			


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